Controlling Usage Capacity In A Radio Access Network - Patent 8111253 by Patents-56

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This disclosure relates to controlling usage capacity in a radio access network.BACKGROUND Cellular wireless communications systems are designed to serve many access terminals distributed in a large geographic area by dividing the area into cells. At the center of each cell, a base transceiver station is located to serve accessterminals (e.g., cellular telephones, laptops, PDAs) located in the cell. Each cell is often further divided into sectors by using multiple sectorized antennas (the term "sector" is used both conventionally and in this document, however, even when thereis only one sector per cell). In each cell, a base transceiver station serves one or more sectors and communicates with multiple access terminals in its cell. A base transceiver station can generally support a certain amount of traffic in each sectorfor a particular bandwidth and it is often desirable to monitor the level of traffic in a sector in order to ensure that the sector is not becoming overloaded.SUMMARY In general, this disclosure relates to controlling usage capacity in a radio access network based on load information feedback so as to allocate limited radio resources amongst competing groups of access terminals with different performancerequirements and priorities. In one aspect, the invention features a method for controlling relative usages, by different groups of access terminals in communication with a radio access network, of available power handling capacity of the radio access network, based oninformation about usages by different groups of access terminals in communication with the radio access network. Implementations of the invention may include one or more of the following. The method for controlling relative usages includes controlling levels of transmission power used by different groups of access terminals in communication with the radioaccess network, based on information about levels of transmission power associated with different groups of access terminals in c

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